Adjustable ball-bearing.



No. 681,683. Patented Sept. 3, 19m.

' H. DECK. V

ADJUSTABLE BALL BEARING.

(Application filed Jan. 26, 1901.)

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UNTTED STATES PATENT OrrIcE.

HENRY DECK, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO \VILLIAM P. M.BRAUN AND JOHN F. BRAUN, OF SAME PLACE, (COPARTNERS TRADING AS JOHNBRAUN AND SONS.)

ADJUSTABLE BALL-BEARING.

SPECIFICATION forming part of Letters Patent No. 681 ,683, datedSeptember 3, 1901. Application filed January 28, 1901. Serial No.45,012. (No model.)

To all whom, it may concern:

Be it known that I, HENRY DECK, of the city of Philadelphia, county ofPhiladelphia, and Stateof Pennsylvania, have invented an Improvement inAdjustable Ball-Bearings, of

which the following is a specification.

My invention relates to adjustable ballbearings for shafts, dvc. and itconsists of the improvements which are fully set forth hereinafter andare shown in the accompanying drawings.

It is the object of my invention to enable the bearing to be adjustedwith facility for the purpose of taking up wear in the bearing parts.

My bearing was designed by me especially for use on the cutter-shafts oflawn-mowers, and in the drawings I have shown it so applied. I do notmean, however, to limit my invention to this use of the bearing, as itis obvious that it may be applied to a great variety of machines.

My invention resides particularly in the devices for effecting theadjustment of the bear- 2 5 ing-cone. The amount of movement required isvery small; but the adjustment must be positive, and lateral movement orrotation of the cone on the shaft should be avoided.

It is the object of my invention to attain these objects by means of anadjusting device which is very simple in construction and may beadjusted with facility.

Figure l is a longitudinal sectional view of an adjustable ball-bearingembodying my in- 3 5 vention; showing the same applied to a lawnmowercutter-shaft. Fig. 2 is a perspective view of the detached adjlisting-screw employed in the form of my invention shown in Fig. 1. Fig.3 is a horizontal sectional view similar to Fig. 1, illustrating adifferent form of my invention; and Fig. 4 is a perspective view of thedetached adjusting-screw employed in the form of the invention shown inFig. 3.

5 a is the cutter-shaft, which carries the cutters b, the latter beingusually secured to spiders 0, carried by the shaft.

d is a part of the side arm or frame upon which the cutter-shaft is journaled.

e is a cone-bearing carried by the shaft or and having its tapered orcone-shaped end f projecting into a recess g in the side arm or frame inwhich the ball-bearings h are arranged.

'5 is the usual disk or plate, located in the recess 9 to receive thethrust of the balls 71,.

The cone e is fast on the shaft a, and the ball-bearing is afforded bythe cone end f and the balls It.

So far as the construction has been described it is well known; but inbearings of this character difficulty has been experienced owing to thewear of the bearing parts, and adjustment is necessary to take up thiswear. This adjustment I accomplish by moving the cone-piece 6 upon theshaft a; but to properly effect the adjustment means must be employedfor positively moving the cone and holding it firmly while the set-screwwhich secures the cone to the shaft is being tight- 7oened. For thispurpose I employ an adjusting-screw having an eccentric connection withthe cone, so that when the cone is loosened and the adjusting-screw isturned the eccentric connection will impart a lougitudi- 5 nal movementto the cone upon the shaft.

In the construction shown in Fig. 1 the adj ust-ing-screw j is carriedin a threaded lug k on the end spider o and is provided on its lowerface with an eccentric recess Z, which engages a lug or pin m, carriedby the cone. When the set-screw n is loosened and the adj usting-screw3' turned, the eccentric connection afforded by the recess Z and pin mwill move the cone longitudinally on the shaft or. 8 5 When the properadjustment is made,the setscrew 71 is tightened. The arrangement of thepin and recess may obviously be reversed. The extent of adjustmentafforded by these devices is very small; but it is sufficient forthe'purpose of taking up the wear. It will be observed that theadjustment is effected with very little turning or lateral movement ofthe cone. Such lateral movement is objectionable, as it is liable toinjure the shaft 5 and changes the bearing-point of the setscrew n.There is of course a slight lateral movement of the cone; but it is sosmall that it is not objectionable.

In the construction shown in Fig. 3 the ad justing-screw is screwedintoathreaded hole lnected with the cone, and adapted when 0 in the coneand is provided on its end with an eccentrically-located -projection 19,which fits a recess 1" in the shaft. In this case as the position of theeccentric-head p is fixed with reference to the shaft the turning of theadjusting-screw will move the cone longitudinally on the shaft. Ajam-nut 8 may be employed to lock the adj listing-screw againstaccidental movement. This is not, however, necessary. The head 19 isrounded or ballshaped to permit it to turn in the recess 1" when thecone is adjusted. This is rendered necessary because of the slightlateral movement of the cone and because play between the head 19 andrecess r is not permissible.

The details of construction may be varied without departing from theinvention.

\Vhat I claim as new, and desire to secure by Letters Patent, is asfollows:

1. In an adjustable ball-bearing for shafts, &c., the combination withthe ball-socket and balls, of a cone carried by the shaft and adapted tobe moved longitudinally thereon, and an adjusting-screw eccentricallyconturned to positivelymove the cone longitudinally on the shaft ineither direction.

2. In an adjustable ball-bearing for shafts, 850., the combination withthe ball-support and balls, of a cone carried by the shaft and adaptedto be moved longitudinally thereon, and an eccentric adjusting deviceengaging said cone and adapted when turned to positively move the conelongitudinally on the shaft in either direction.

3. In an adjustable ball-bearing for shafts, &c., the com biuation withthe ball-support and balls, of a cone carried by the shaft and movablelongitudinally thereon and an adjusting-screw having a pivotalconnection with the shaft and eccentrically connected with theeone.

In testimony of which invention I have hereunto set-"any hand.

HENRY DECK.

\Vitnesses:

J EssE GILBERT, THEO II. ROTH.

